nkeynes@492: /**
nkeynes@561:  * $Id$
nkeynes@492:  *
nkeynes@492:  * NullDC GDI image format
nkeynes@492:  *
nkeynes@492:  * Copyright (c) 2005 Nathan Keynes.
nkeynes@492:  *
nkeynes@492:  * This program is free software; you can redistribute it and/or modify
nkeynes@492:  * it under the terms of the GNU General Public License as published by
nkeynes@492:  * the Free Software Foundation; either version 2 of the License, or
nkeynes@492:  * (at your option) any later version.
nkeynes@492:  *
nkeynes@492:  * This program is distributed in the hope that it will be useful,
nkeynes@492:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
nkeynes@492:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
nkeynes@492:  * GNU General Public License for more details.
nkeynes@492:  */
nkeynes@492: 
nkeynes@492: #include <stdlib.h>
nkeynes@492: #include <stdio.h>
nkeynes@492: #include <stdint.h>
nkeynes@492: #include <fcntl.h>
nkeynes@492: #include <errno.h>
nkeynes@492: #include <sys/stat.h>
nkeynes@492: #include <glib/gutils.h>
nkeynes@492: #include "gdrom/gdrom.h"
nkeynes@492: 
nkeynes@492: 
nkeynes@492: static gboolean gdi_image_is_valid( FILE *f );
nkeynes@492: static gdrom_disc_t gdi_image_open( const gchar *filename, FILE *f );
nkeynes@492: 
nkeynes@492: struct gdrom_image_class gdi_image_class = { "NullDC GD-Rom Image", "gdi", 
nkeynes@492: 					     gdi_image_is_valid, gdi_image_open };
nkeynes@492: 
nkeynes@492: static gboolean gdi_image_is_valid( FILE *f )
nkeynes@492: {
nkeynes@492:     char line[512];
nkeynes@492:     uint32_t track_count;
nkeynes@492:    
nkeynes@492:     fseek(f, 0, SEEK_SET);
nkeynes@492:     if( fgets( line, sizeof(line), f ) == NULL ) {
nkeynes@492: 	return FALSE;
nkeynes@492:     }
nkeynes@492:     track_count = strtoul(line, NULL, 0);
nkeynes@492:     if( track_count == 0 || track_count > 99 ) {
nkeynes@492: 	return FALSE;
nkeynes@492:     }
nkeynes@492:     return TRUE;
nkeynes@492: }
nkeynes@492: 
nkeynes@492: static gdrom_disc_t gdi_image_open( const gchar *filename, FILE *f )
nkeynes@492: {
nkeynes@492:     int i;
nkeynes@492:     uint32_t track_count;
nkeynes@492:     gdrom_disc_t disc;
nkeynes@492:     gdrom_image_t image;
nkeynes@492:     struct stat st;
nkeynes@492:     char line[512];
nkeynes@492:     gchar *dirname;
nkeynes@492: 
nkeynes@492:     fseek(f, 0, SEEK_SET);
nkeynes@492:     
nkeynes@492:     if( fgets( line, sizeof(line), f ) == NULL ) {
nkeynes@492: 	return FALSE;
nkeynes@492:     }
nkeynes@492:     track_count = strtoul(line, NULL, 0);
nkeynes@492:     if( track_count == 0 || track_count > 99 ) {
nkeynes@492: 	return NULL;
nkeynes@492:     }
nkeynes@492: 
nkeynes@492:     disc = gdrom_image_new(filename, f);
nkeynes@492:     if( disc == NULL ) {
nkeynes@492: 	ERROR("Unable to allocate memory!");
nkeynes@492: 	return NULL;
nkeynes@492:     }
nkeynes@492:     dirname = g_path_get_dirname(filename);
nkeynes@492:     image = (gdrom_image_t)disc;
nkeynes@492:     image->disc_type = IDE_DISC_GDROM;
nkeynes@492:     image->track_count = track_count;
nkeynes@492:     for( i=0; i<track_count; i++ ) {
nkeynes@492: 	int track_no, start_lba, flags, size, offset;
nkeynes@492: 	char filename[256];
nkeynes@492: 
nkeynes@492: 	if( fgets( line, sizeof(line), f ) == NULL ) {
nkeynes@492: 	    gdrom_image_destroy_no_close(disc);
nkeynes@492: 	    return NULL;
nkeynes@492: 	}
nkeynes@492: 	sscanf( line, "%d %d %d %d %s %d", &track_no, &start_lba, &flags, &size,
nkeynes@498: 		filename, &offset );
nkeynes@492: 	if( start_lba >= 45000 ) {
nkeynes@492: 	    image->track[i].session = 1;
nkeynes@492: 	} else {
nkeynes@492: 	    image->track[i].session = 0;
nkeynes@492: 	}
nkeynes@492: 	image->track[i].lba = start_lba + 150; // 2-second offset
nkeynes@492: 	image->track[i].flags = (flags & 0x0F)<<4;
nkeynes@492: 	image->track[i].sector_size = size;
nkeynes@492: 	if( strcasecmp( filename, "none" ) == 0 ) {
nkeynes@492: 	    image->track[i].file = NULL;
nkeynes@492: 	    image->track[i].sector_count = 0;
nkeynes@492: 	    image->track[i].mode = GDROM_MODE1;
nkeynes@492: 	} else {
nkeynes@492: 	    gchar *pathname = g_strdup_printf( "%s%c%s", dirname, G_DIR_SEPARATOR, filename );
nkeynes@492: 	    image->track[i].file = fopen( pathname, "ro" );
nkeynes@492: 	    g_free(pathname);
nkeynes@492: 	    if( image->track[i].file == NULL ) {
nkeynes@492: 		gdrom_image_destroy_no_close(disc);
nkeynes@492: 		g_free(dirname);
nkeynes@492: 		return NULL;
nkeynes@492: 	    }
nkeynes@492: 	    fstat( fileno(image->track[i].file), &st );
nkeynes@492: 	    image->track[i].sector_count = st.st_size / size;
nkeynes@498: 	    if( image->track[i].flags & TRACK_DATA ) {
nkeynes@498: 		/* Data track */
nkeynes@498: 		switch(size) {
nkeynes@498: 		case 2048: image->track[i].mode = GDROM_MODE1; break;
nkeynes@498: 		case 2336: image->track[i].mode = GDROM_GD; break;
nkeynes@498: 		case 2352: image->track[i].mode = GDROM_RAW; break;
nkeynes@498: 		default:
nkeynes@498: 		    gdrom_image_destroy_no_close(disc);
nkeynes@498: 		    g_free(dirname);
nkeynes@498: 		    return NULL;
nkeynes@498: 		}
nkeynes@498: 	    } else {
nkeynes@498: 		/* Audio track */
nkeynes@498: 		image->track[i].mode = GDROM_CDDA;
nkeynes@498: 		if( size != 2352 ) {
nkeynes@498: 		    gdrom_image_destroy_no_close(disc);
nkeynes@498: 		    g_free(dirname);
nkeynes@498: 		    return NULL;
nkeynes@498: 		}
nkeynes@492: 	    }
nkeynes@492: 	}
nkeynes@492: 	image->track[i].offset = offset;
nkeynes@492:     }
nkeynes@492:     g_free(dirname);
nkeynes@492:     return disc;
nkeynes@492: }